TY - JOUR
T1 - Capacity analysis of OMA-PAS and NOMA-PAS
AU - Ke, Shengyu
AU - Lei, Hongjiang
AU - Park, Ki Hong
AU - Ye, Jia
AU - Pan, Gaofeng
N1 - Publisher Copyright:
© 2026 Elsevier B.V.
PY - 2026/8/1
Y1 - 2026/8/1
N2 - With the evolution of wireless communication technologies, pinching antenna system (PAS), as an emerging flexible antenna technology, offers a new perspective to address coverage and capacity issues in indoor wireless communications. Focusing on the multi-user downlink scenario, this paper establishes a system model based on Nakagami-m fading channels and conducts a comparative analysis of the performance of orthogonal multiple access (OMA) and non-orthogonal multiple access (NOMA) within PAS. By deriving exact analytical expressions for the ergodic sum rate and asymptotic closed-form results in the high signal-to-noise ratio (SNR) regime, the impact of key parameters, such as channel fading parameters and service area dimensions, on system performance is revealed. Theoretical and simulation results demonstrate that the NOMA protocol significantly enhances the spectral efficiency of PAS, exhibiting a distinct advantage particularly in the high SNR regime.
AB - With the evolution of wireless communication technologies, pinching antenna system (PAS), as an emerging flexible antenna technology, offers a new perspective to address coverage and capacity issues in indoor wireless communications. Focusing on the multi-user downlink scenario, this paper establishes a system model based on Nakagami-m fading channels and conducts a comparative analysis of the performance of orthogonal multiple access (OMA) and non-orthogonal multiple access (NOMA) within PAS. By deriving exact analytical expressions for the ergodic sum rate and asymptotic closed-form results in the high signal-to-noise ratio (SNR) regime, the impact of key parameters, such as channel fading parameters and service area dimensions, on system performance is revealed. Theoretical and simulation results demonstrate that the NOMA protocol significantly enhances the spectral efficiency of PAS, exhibiting a distinct advantage particularly in the high SNR regime.
KW - Ergodic sum rate
KW - Nakagami-m fading
KW - Non-orthogonal multiple access
KW - Performance analysis
KW - Pinching antenna systems
UR - https://www.scopus.com/pages/publications/105043309162
U2 - 10.1016/j.phycom.2026.103249
DO - 10.1016/j.phycom.2026.103249
M3 - Article
AN - SCOPUS:105043309162
SN - 1874-4907
VL - 78
JO - Physical Communication
JF - Physical Communication
M1 - 103249
ER -